Tucked away at the northern tip of Long Beach Island, Coast Guard Station Barnegat Light is one of those places where Barnegat Inlet delivers not just the headlines, but the people behind them. As the nation marks its 250th birthday, I find myself chasing the backstory of this stretch of the Jersey Shore and the U.S. Coast Guard, which has been the guardian of these waters since the 18th century.

Covering the Coast Guard always starts with what you can see: the mission, and the call that comes when the waters off…